1. Persistent HeadacheYour brain is incredibly powerful and controls almost everything in your body. It releases the stress hormones that tell your body how to react. It controls the nerves, muscles and ligaments that tense up and bear stress-related injury. It control the immune, heart and stomach reactions to stress as well. When your body tenses in any area for too long, it can lead to headache issues, whether that stems from tension at the back of the neck or sinus complications from a reduced immune system.

2. Sore MusclesMuscle tension is the body’s reflex reaction to stress, says the American Psychological Association. It’s a gut-reaction guard against injury and pain. Tense shoulders, neck and back can hurt daily — and lead to those migraine and tension headaches mentioned above.